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I don't know how to do this. Determine the solubility at 25°C of Cd(IO3)2 in water and in 0.20 M CdCl2.
4 answers
asked by
Andrea
2,292 views
MnS(s) + 2 H+ --> Mn2+ + H2S(g)
At 25 C the solubility product constant, Ksp, for MnS is 5 x 10-15 and the acid dissociation
5 answers
asked by
AL
5,145 views
Which molecule has the strongest intermolecular forces?
A. HOCH2CH2CH2OH B. CH3CH2CH2OH C. CH3CH2CH2CH3 D. HOCH2CHOHCHOHCH2OH I'm
6 answers
asked by
Andrea
5,284 views
CH3CH2NH2(aq) + H2O(l) <-> CH3CH2NH3+(aq) + OH-(aq)
Kb = 5.0e-4 Ethylamine, CH3CH2NH, a weak base reacts with water according to
4 answers
asked by
Jess
9,706 views
Redox Titrations:
a. write 2-3 sentences describing and identifying the type of chemical reaction that occurs when Fe2+ reacts
7 answers
asked by
chemstudent
1,561 views
A first-order reaction has a rate constant of 0.547 min - 1. How long will it take a reactant concentration 0.14 M to decrease
4 answers
asked by
Andrea
1,223 views
A silver-copper alloy had a mass of 0.1264g. When the alloy was dissolved in nitric acid and the silver precipitated as silver
4 answers
asked by
sam
1,944 views
What is the net ionic equation when NaOBr is dissolved in water and the Ksp if the Ksp of the dissocataion of HOBr is 6.4 *
4 answers
asked by
james
2,202 views
An electrochemical cell consists of a nickel metal electrode immersed in a solution with [Ni2+] = 1.0 M separated by a porous
4 answers
asked by
Halie
3,207 views
A sample of (N2H5)2C3H4O4 contains 1.084 x 1024 carbon atoms. How many moles of hydrogen atoms are there in the same sample?
5 answers
asked by
Sanz
2,898 views
A chemist added an excess of sodium sulfate to a solution of a soluble barium compound to precipitate all of the barium ion as
4 answers
asked by
Anna
4,026 views
A student performs an experiment to determine the enthalpy of neutralization of hydrochloric acid and sodium hydroxide. The
3 answers
asked by
Rachel
1,086 views
At a particular temperature, Kp = 0.25 for the following reaction.
N2O4(g) 2 NO2(g) (a) A flask containing only N2O4 at an
4 answers
asked by
Bill
3,561 views
use simple structure and bonding models to account for each of the following:
A. the bond length between the two carbon atoms is
4 answers
asked by
Justyna
1,882 views
When NH3 gas is introduced at one end of a long tube while HCl gas is introduced simultaneously at the other end, a ring of
4 answers
asked by
Belinda
4,692 views
A solution of hydrogen peroxide, H2O2, is titrated with a solution of potassium permanganate, KMnO4.
It requires 51.7 mL of 0.145
4 answers
asked by
Anna
3,975 views
Consider the following unbalanced equation:
Ca3(Po4)2+H2SO-->CaSO4+H3PO What masses of calcium sulfate and phosphoric acid can be
4 answers
asked by
Robyn
1,465 views
How many mL of 3.84 M HCL are required to consume 4.12g of Zinc in the following reaction?
Zn(s) + 2HCL(aq)----> ZnCl2(aq) +
5 answers
asked by
Bobby
1,631 views
A student conducts an experiments to determine the enthalpy of neutralization for phosphoric acid reacting with sodium
4 answers
asked by
Beth
1,546 views
The following reaction has Kp = 109 at 25°C.
2 NO(g) + Br2(g) 2 NOBr(g) If the equilibrium partial pressure of Br2 is 0.0159 atm
4 answers
asked by
Bill
2,702 views
At a particular temperature, K = 1.00 102 for the following reaction.
H2(g) + I2(g) 2 HI(g) In an experiment, 1.23 mol H2, 1.23
4 answers
asked by
Bill
5,036 views
For the following equilibrium system, which of the following changes will form more CaCO3?
CO2(g) + Ca(OH)2(s) <--> CaCO3(s) +
4 answers
asked by
Lisa
5,456 views
Reaction 1: NaOH + HCL --> H20 + NaCl delta H of -100.332 kj/mol
Reaction 2: NaOH + NH4Cl --> NH3 + H20 : delta H of 358.639
4 answers
asked by
Serena
5,287 views
Write the half reactions and the balanced
equation for the galvanic cell Hg(ℓ)| Hg2+ 2 (aq)|| MnO− 4 (aq), Mn2+(aq), H +(aq)|
4 answers
asked by
Anonymous
1,871 views
Write 2 complete Bronsted/Lowry acid/base reactions for the reaction between HC2c2O4- and HPO42-. Identify all conjugate pairs.
m
4 answers
asked by
Kelly
1,202 views
Which of the following conditions would most likely affect the rate of a chemical reaction?
A. Increasing the number of reaction
4 answers
asked by
Andrea
2,705 views
2Al(s) + 3Pb2 ==> Al2Pb3
So the question says using that equation, what is the standard free energy. Faraday’s J constant is
4 answers
asked by
luigi
451 views
The vapor pressure of diethyl ether C2H5OC2H5 is greater than the vapor pressure of ethyl alcohol, C2H5OH at any temperature.
2 answers
asked by
Anonymous
832 views
What is the freezing point in degrees Celsius of a solution prepared by dissolving 11.3 (g) of calcium nitrate in 115 (g) of
1 answer
asked by
Anonymous
413 views
What is the STP for temperature? Is it 25 degrees Celsius?
DO you go to Gateway High? me? no. why? STP is 1 atmosphere for
1 answer
asked by
Belinda
876 views
RATES: If you double the concentration of reactant A in the reaction A + 2B �¨ C, what happens to the rate based on the rate
1 answer
asked by
Chemwiz
1,243 views
When a gas filled balloon is cooled, it shrinks in volume; this occurs no matter what gas is originally placed in the balloon.
1 answer
asked by
Belinda
1,032 views
I missed a lab in class a week ago and had to make it up just the other day. My teacher didn't have time to explain the lab to
1 answer
asked by
Jess
1,180 views
Write the net ionic formula.
A bar of strontium metal is immersed in a 1.0 M copper (II) nitrate solution. How do I go about
5 answers
asked by
Needs help
925 views
A solution of potassium phosphate is mixed with a solution of calcium acetate.
I am supposed to write a net ionic equation.
4 answers
asked by
Please check
6,340 views
i always get the error analysis section of my lab wrong so i need a NON human error in an experiment involving the diffusion of
2 answers
asked by
Blair
552 views
a 4.22 gram sample of copper II sulfide was added to excess hydrocholoric acid with hydrogen sulfide gas being generated and
3 answers
asked by
Susan Shoemaker
881 views
I am really having a hard time with this question.
Which of these compounds will exhibit optical isomerism? Show why. a)
3 answers
asked by
Christopher
471 views
Sorry, I have one other question. How would I go about solving this problem?
<b>What fraction of the total volume of a closet
4 answers
asked by
Nick
409 views
What's the products when ammonium chloride dissolves in water?
1 answer
asked by
Tiffany
435 views
Use the following information to identify element A and compound B, then answer questions a and b.
I'm so stuck on this problem
14 answers
asked by
John
921 views
which would be the limiting reagent in the reaction: 2H2(g) + O2(g) => 2H2O(g)
1. 50 molecules of H2 or 2. 50 molecules of O2
3 answers
asked by
gus
931 views
Combustion of 6.38 mg of ethylene glycol gives 9.06 mg CO2 and 5.58 mg H20. The compound contains only C, H, and O. What are the
6 answers
asked by
Anna
1,797 views
Calculate the number of atoms in 32.0 g Br2.
I keep getting 1.20 * 10^23 atoms Br2 but my book says i'm wrong.
3 answers
asked by
Anna
978 views
I know this might sound easy... but i need these problems for bonus and i want to make sure they are right
Silver nitrate reacts
4 answers
asked by
Anna-Marie
2,855 views
Whew. long question.
Barium carbonate is the source of barium compounds. It is produced in an aqueous precipitation reaction from
3 answers
asked by
Anna-Marie
2,298 views
Complete and balance each of the following molecular equations, including phase labels, if a reaction occurs. Then write the net
4 answers
asked by
Anna
1,514 views
A 3.50 g sample of KCl is dissolved in 10.0 mL of water. The resulting solution is then added to 60.0 mL of a 0.500 M CaCl2(aq)
4 answers
asked by
Anna
2,370 views
An aqueous solution contains 4.50 g of calcium chloride, CaCl2, per liter. What is the molarity of CaCl2? When calcium chloride
6 answers
asked by
Anna
1,259 views
A sample of H2 is collected by displacing 145 mL of water. The pressures of the gas and the atmosphere are equalized. The
3 answers
asked by
Anna
1,976 views
what is the hybridization of ClF3? and BrF3
1 answer
asked by
Lizzy
373 views
How do u draw the SO4 neutral atom??? w/o formal charge
1 answer
asked by
Emily
440 views
Helium gas, He, at 22 degrees C and 1.00 atm occupied a vessel whose volume was 2.54 L. What volume would this gas occupy if it
6 answers
asked by
Anna
2,485 views
Can someone please check these problems?
34. You fill a balloon with helium gas to a volume of 2.68 L at 23 degrees C and 789
7 answers
asked by
Anna
2,407 views
Help with these two please.
105. A radioactive metal atom decays (goes to another kind of atom) by emitting an alpha particle
2 answers
asked by
Anna
471 views
Ammonium Chloride is a white solid. When heated to 325 degrees C, it gives a vapor that is a mixture of ammonia and hydrogen
1 answer
asked by
Anna
536 views
Phosphorus pentachloride is a white solid that sublimes (vaporizes without melting) at about 100 degrees C. At higher
1 answer
asked by
Anna
637 views
Ammonium Chloride is a white solid. When heated to 325 degrees C, it gives a vapor that is a mixture of ammonia and hydrogen
1 answer
asked by
Anna
498 views
Phosphorus pentachloride is a white solid that sublimes (vaporizes without melting) at about 100 degrees C. At higher
1 answer
asked by
Anna
483 views
Would someone please check these for me?
52. In an experiment, you fill a heavy-walled 5.00-L flask with methane gas, CH4. If the
3 answers
asked by
Anna
1,278 views
When dealing with gasses, do you subtract the pressure of water vapor every time it is in the equation? I'm confused on when you
3 answers
asked by
Anna
880 views
87. At what temperature would CO2 molecules have an rms speed equal to H2 molecules 25 degrees C?
First I got the rms of H2 to be
4 answers
asked by
Anna
1,829 views
In a typical synthesis reaction, 0.142 g of chlorine gas is reacted with an unkown elemnt X to form a compound with the formula
3 answers
asked by
Anna
830 views
A 0.23 M sodium chlorobenzoate (NaC7H4ClO2) solution has a pH of 8.68. Calculate the pH of a 0.23 M chlorobenzoic acid
2 answers
asked by
Jake
534 views
A student placed 17.5 g of glucose in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully
2 answers
asked by
Ana
1,482 views
Determine the [H3O^+] of a 0.240 M solution of formic acid.
3 answers
asked by
Eddie
886 views
A sample of solid KCl (potassium chloride) weighing 0.500 g is mixed with an unweighed sample of solid MgCl2 (magnesium
5 answers
asked by
benji
824 views
A student chemist named Hannah Montana set up an electrical conductivity tester similar to that shown on page 141 and conducted
2 answers
asked by
dylan
632 views
Calculate the average kenetic energy of the CH4 molecules in a sample of CH4 gas at 273K and at 546K.
So, should I have two
2 answers
asked by
Amber
728 views
Pretend you are a nuclear scientist and try to answer this bonus question. Uranium -235 (235U) is used as a fuel in nuclear
2 answers
asked by
derek
554 views
Consider the reaction
2 Al2O3(s) -> 4 Al(s) + 3 O2(g) . �H = +3339.6 kJ/mol What is the change in heat when 0.455 L of a 3.60 M
4 answers
asked by
Beth
2,030 views
The energy change �H associated with the
reaction NBr3(g) + 3H2O(g) -> 3HOBr(g) + NH3(g) is +81 kJ/mol rxn. These bond energy
4 answers
asked by
Beth
1,483 views
The heat of combustion of octane (C8H18) is 47.8 kJ/g and one gallon of C8H18 has a mass of 2620 g. If a car using octane is
3 answers
asked by
Kai
2,075 views
What energy change is associated with the reaction to obtain one mole of H2 from one mole of water vapor? The balanced equation
5 answers
asked by
Kai
1,563 views
What energy change is associated with the reaction to obtain one mole of H2 from one mole of water vapor? The balanced equation
3 answers
asked by
Kai
1,360 views
For the system
CO(g) + H2O(g)<-->CO2(g) + H2(g) Kp is 1.6 at 900 K. If 0.400 atm CO(g) and 0.400 atm H2O(g) are combined in a
1 answer
asked by
Andrew
808 views
The formula for epson salts is MgSO4*7H2O. If 1.250 g of the compound is dissolved in water, calculate the number of milliliters
2 answers
asked by
Melissa
792 views
What mass of K2CO3 is required to clean up a spill of 282 ml of 1.05 M HCl if HCl(aq) reacts with K2CO3 according to
2HCl(aq) +
1 answer
asked by
Sky
431 views
What is the pH of 0.2 M solution of sodium propanoate?
2 answers
asked by
Leigh
497 views
An ore contains Fe3O4 and no other iron. The iron in a 51-gram sample of the ore is all converted by a series of chemical
7 answers
asked by
Chandler
1,311 views
It takes 58 mL of 0.124 M KOH to neutralize 34.5 mL of H2SO4 solution. What is the concentration of the H2SO4 solution? Answer
3 answers
asked by
Chandler
2,186 views
When 0.076 moles of lead(II) nitrate are dis-
solved in enough water to make 670 mililiters of solution, what is the molar
4 answers
asked by
Lutesia
582 views
I'm having trouble balancing these two oxidation-reduction reactions that occur in a basic solution. Can anyone help? Please?
2 answers
asked by
rose
591 views
the activation energy for the reaction H2+I2 >>2HI is 167kJ/mol, and deltaE for the reaction is +28kJ/mol. What is the
1 answer
asked by
Grace Henry
929 views
The Ksp for silver sulfate (Ag2SO4) is 1.2 10-5. Calculate the solubility of silver sulfate in each of the following.
0.30 M
2 answers
asked by
Bill
1,078 views
At a certain temperature, 4.0 mol NH3 is introduced into a 2.0 L container, and the NH3 partially dissociates by the reaction.
2
5 answers
asked by
Bill
2,692 views
At a particular temperature, K = 3.75 for the following reaction.
SO2(g) + NO2(g) SO3(g) + NO(g) If all four gases had initial
1 answer
asked by
Bill
430 views
A weak acid (HA) is found to ionize 16.2%
when mixed at a concentration of 0.21 mol/L. What is the value of Ka for this acid?
1 answer
asked by
Sam
373 views
An apparatus consists of a 4 L flask containing nitrogen gas at 32 C and 885 kPa, joined by a valve to a 8 L flask containing
3 answers
asked by
Sarah
1,195 views
Calculate the correct volumes of the 0.1M acetic acid solution and the 0.1M sodium acetate solution needed to make 50mL of a
3 answers
asked by
Keighley
858 views
Sulfuric acid (H2SO4) is a very strong diprotic acid. If 0.054 moles of sulfuric acid is mixed with water to make 667 milliliter
3 answers
asked by
Nick
2,054 views
1.513g of monoprotic acid (HX) is dissolved in water, and the volume is 250.0 ml after the dissolving. The solution was then
1 answer
asked by
Anna
430 views
Consider 25.0 ml of .300 MHNO2 that is titrated with .500 M Find ph at eq pt
3 answers
asked by
Anna
251 views
3 NO2(g) + H2O(g) 2 HNO3(g) + NO(g)
At constant temperature and pressure, what is the maximum volume, in liters, of HNO3(g) that
2 answers
asked by
Nihar
577 views
How many liters of carbon dioxide will go into the air when 642.9 grams of gasoline (C8H18) is burned in complete combustion at
1 answer
asked by
Nihar
349 views
A sample of 0.71 moles of a metal M reacts completely with excess fluorine to form 44.24 grams of MF2.
How many moles of F are in
1 answer
asked by
Nihar
437 views
how many milliliters of 0.10 M HCl must be added to 50.0 mL of 0.40 HCl to give a final solution that has a molarity of 0.25 M?
3 answers
asked by
Allie
1,783 views
Complete and balance the following equations and identify oxidizing and reducing agents.
S+HNO3---->H2SO3+N2O
2 answers
asked by
Rina
825 views
(MnO40- + (C2O4)2- + H+ = CO2 + H2O + ?
OR (MnO4)- + (C2O4)2-+ OH-=CO2 n+ H2O +? Can somebody please help me predict the
2 answers
asked by
Colin
578 views
A 1.73 g sample of a molecular compound
is dissolved in 105 g of tetrachloromethane (carbon tetrachloride). The normal boiling
4 answers
asked by
John Smith
1,714 views
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